Index: firmware/App/Controllers/Ultrafiltration.c
===================================================================
diff -u -r0bcac6885c8461b05da276fd245b580b7339ddfd -ree311636fcfb7db1913edef2d9fea22153465a87
--- firmware/App/Controllers/Ultrafiltration.c	(.../Ultrafiltration.c)	(revision 0bcac6885c8461b05da276fd245b580b7339ddfd)
+++ firmware/App/Controllers/Ultrafiltration.c	(.../Ultrafiltration.c)	(revision ee311636fcfb7db1913edef2d9fea22153465a87)
@@ -204,8 +204,9 @@
  *************************************************************************/
 static void updateUFRequest( void )
 {
-    F32 qd      = getTDDialysateFlowrate();
-    BOOL bypass = getTDDialyzerBypass();
+    F32 qd         = getTDDialysateFlowrate();
+    BOOL bypass    = getTDDialyzerBypass();
+    BOOL prevState = isUltrafiltrationRequested;
 
     // update latest UF run/pause request
     // if qd is zero or dialyzer is bypassed, UF pump should be turn off
@@ -217,6 +218,12 @@
     {
         isUltrafiltrationRequested = FALSE;
     }
+
+    // event update on state switch
+    if( prevState != isUltrafiltrationRequested )
+    {
+        SEND_EVENT_WITH_2_U32_DATA( DD_EVENT_UF_STATE_CHANGE, prevState, isUltrafiltrationRequested );
+    }
 }
 
 /*********************************************************************//**